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https://github.com/golang/go
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ff30247f34
This adds support for calling import from the gopls command line, e.g. $ gopls imports -w ~/tmp/foo/main.go Optional arguments are: -w, which writes the changes back to the original file; and -d, which prints a unified diff to stdout With no arguments, the changed file is printed to stdout. Updates golang/go#32875 Change-Id: I12f980d977fe12c16e51b024c9dd28c33ba6c002 GitHub-Last-Rev: c3fdd90e25204e7a12a94e9dfde389b7674e7e6d GitHub-Pull-Request: golang/tools#176 Reviewed-on: https://go-review.googlesource.com/c/tools/+/202624 Run-TryBot: Rebecca Stambler <rstambler@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cmd
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import (
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"context"
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"flag"
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"fmt"
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"io/ioutil"
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"golang.org/x/tools/internal/lsp/diff"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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"golang.org/x/tools/internal/span"
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"golang.org/x/tools/internal/tool"
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errors "golang.org/x/xerrors"
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)
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// imports implements the import verb for gopls.
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type imports struct {
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Diff bool `flag:"d" help:"display diffs instead of rewriting files"`
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Write bool `flag:"w" help:"write result to (source) file instead of stdout"`
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app *Application
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}
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func (t *imports) Name() string { return "imports" }
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func (t *imports) Usage() string { return "<filename>" }
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func (t *imports) ShortHelp() string { return "updates import statements" }
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func (t *imports) DetailedHelp(f *flag.FlagSet) {
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fmt.Fprintf(f.Output(), `
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Example: update imports statements in a file:
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$ gopls imports -w internal/lsp/cmd/check.go
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gopls imports flags are:
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`)
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f.PrintDefaults()
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}
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// Run performs diagnostic checks on the file specified and either;
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// - if -w is specified, updates the file in place;
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// - if -d is specified, prints out unified diffs of the changes; or
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// - otherwise, prints the new versions to stdout.
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func (t *imports) Run(ctx context.Context, args ...string) error {
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if len(args) != 1 {
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return tool.CommandLineErrorf("imports expects 1 argument")
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}
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conn, err := t.app.connect(ctx)
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if err != nil {
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return err
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}
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defer conn.terminate(ctx)
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from := span.Parse(args[0])
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uri := from.URI()
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file := conn.AddFile(ctx, uri)
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if file.err != nil {
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return file.err
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}
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actions, err := conn.CodeAction(ctx, &protocol.CodeActionParams{
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TextDocument: protocol.TextDocumentIdentifier{
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URI: protocol.NewURI(uri),
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},
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})
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if err != nil {
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return errors.Errorf("%v: %v", from, err)
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}
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var edits []protocol.TextEdit
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for _, a := range actions {
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if a.Title == "Organize Imports" {
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edits = (*a.Edit.Changes)[string(uri)]
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}
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}
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sedits, err := source.FromProtocolEdits(file.mapper, edits)
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if err != nil {
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return errors.Errorf("%v: %v", edits, err)
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}
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newContent := diff.ApplyEdits(string(file.mapper.Content), sedits)
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filename := file.uri.Filename()
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switch {
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case t.Write:
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if len(edits) > 0 {
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ioutil.WriteFile(filename, []byte(newContent), 0644)
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}
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case t.Diff:
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diffs := diff.ToUnified(filename+".orig", filename, string(file.mapper.Content), sedits)
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fmt.Print(diffs)
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default:
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fmt.Print(string(newContent))
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}
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return nil
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}
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